CN105338464B - Electronic device and wireless communication method on user equipment side in wireless communication system - Google Patents

Electronic device and wireless communication method on user equipment side in wireless communication system Download PDF

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Publication number
CN105338464B
CN105338464B CN201410269832.3A CN201410269832A CN105338464B CN 105338464 B CN105338464 B CN 105338464B CN 201410269832 A CN201410269832 A CN 201410269832A CN 105338464 B CN105338464 B CN 105338464B
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user equipment
communication
information
user
electronic device
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CN105338464A (en
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许晓东
杨程程
林伟阳
王策
陈楠楠
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Sony Corp
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Sony Corp
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Priority to CN201410269832.3A priority Critical patent/CN105338464B/en
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP2016572540A priority patent/JP6540717B2/en
Priority to KR1020177000390A priority patent/KR20170020421A/en
Priority to US15/310,329 priority patent/US10327227B2/en
Priority to PCT/CN2015/081048 priority patent/WO2015192726A1/en
Priority to EP15809333.6A priority patent/EP3160202B1/en
Publication of CN105338464A publication Critical patent/CN105338464A/en
Priority to US16/400,042 priority patent/US10849107B2/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present disclosure relates to an electronic device and a wireless communication method on a user equipment side in a wireless communication system. An electronic device according to the present disclosure includes: a communication unit configured to communicate device-to-device D2D under a cellular communication protocol with a plurality of user devices to transmit data and/or control information directly to the plurality of user devices; and a configuration unit configured to configure a resource and a modulation and coding scheme, MCS, for D2D communication between a first user equipment and a second user equipment of the plurality of user equipments, wherein the second user equipment is a candidate for D2D communication by the first user equipment, wherein the communication unit transmits information indicating the resource and the MCS to the first user equipment and the second user equipment.

Description

Electronic device and wireless communication method on user equipment side in wireless communication system
Technical Field
The present disclosure relates to the field of wireless communication, and in particular to an electronic device on a user equipment side in a wireless communication system and a method for wireless communication in a wireless communication system.
Background
This section provides background information related to the present disclosure, which is not necessarily prior art.
The D2D (Device-to-Device) communication technology refers to an information transmission method in which cellular communication UE (user equipment) directly performs data interaction in a terminal-to-Device manner. Compared with the traditional cellular communication, the D2D communication has the advantages of multiplexing spectrum resources, short transmission distance and information not being transferred through the base station, so that the D2D communication can increase the spectrum utilization rate and reduce the UE transmitting power and the base station load. When a Device-to-Device User Equipment (DUE) in D2D communication needs to be switched from a D2D communication mode to a conventional cellular communication mode, the design of the switching process and the signaling involved are not yet involved in the current standardization work. However, since the switching of the communication mode is different from a switching mechanism of a conventional UE from one base station to another base station, and is embodied in that a communication target of one UE is switched from the UE to the base station, and is switched from a non-conventional communication mode to a conventional communication mode, a switching process under the mechanism needs to be specified and designed according to a specific scenario, so that the rationality and reliability of the switching process are ensured while signaling overhead is reduced to the maximum extent.
In addition, D2D broadcast is an important concern of current 3GPP (3rd Generation Partnership Project) RAN1(Radio Access Network), mainly for the public safety domain. The D2D broadcast is a point-to-multipoint communication, and the source DUE is a broadcast source UE providing broadcast services that provides the same information for the remaining DUE, and typically does not need to receive UE feedback information. DUE to certain factors, when the D2D broadcast link quality becomes poor and cannot meet the service requirement of receiving DUE, the D2D communication needs to switch from the broadcast mode to other modes to ensure the integrity of information reception. However, the specific flow and scheme of the D2D communication for switching from broadcast mode to other mode, e.g. by which entity and how the mode switch is triggered without feedback information, has not been discussed in the prior art either. In some known studies, a UE cluster may be constructed when there is a communication demand for a plurality of DUE satisfying a certain distance condition. The advantage of the D2D communication cluster is that a certain centralized controllability is achieved, that is, the base station only needs to maintain the conventional link with a small number of UEs in the cluster, so that the whole cluster is equivalent to maintaining the conventional link with the base station. In the DUE Cluster, one of the DUE may be set as a Cluster Head (Cluster Head), and the Cluster Head maintains a conventional link connection with the base station and is responsible for forwarding information from the base station. Nodes within the DUE cluster, outside the cluster head, are called dependent DUE. There is no connection link between the dependent DUE and the cell base station or only limited communication, e.g. in LTE-DETACHED state. When the subordinate DUE is in a no-connection state or has limited communication with the base station, interactive signaling is greatly reduced compared with the case where all UEs maintain link connection with the base station. The communication mode is not only suitable for the communication scene of future high-speed and intensive cell deployment, but also suitable for the scene consideration in the field of public safety. However, the specific function of the cluster head and the operations that need to be engaged in D2D communication and the corresponding operations of its dependent DUE require further specifications and design.
Disclosure of Invention
This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.
An object of the present disclosure is to provide an electronic device on a user equipment side in a wireless communication system and a method for wireless communication in a wireless communication system, such that assistance of a cluster head is clarified and enhanced, thereby solving at least one of the above-mentioned technical problems.
According to an aspect of the present disclosure, there is provided an electronic device on a user equipment side in a wireless communication system, the electronic device including: a communication unit configured to communicate device-to-device D2D under a cellular communication protocol with a plurality of user devices to transmit data and/or control information directly to the plurality of user devices; and a configuration unit configured to configure a resource and a modulation and coding scheme, MCS, for D2D communication between a first user equipment and a second user equipment of the plurality of user equipments, wherein the second user equipment is a candidate for D2D communication by the first user equipment, wherein the communication unit transmits information indicating the resource and the MCS to the first user equipment and the second user equipment.
According to another aspect of the present disclosure, there is provided an electronic device on a user equipment side in a wireless communication system, the electronic device including: a communication unit configured to receive, from a first user equipment, information indicating a resource and a modulation and coding scheme, MCS, for D2D communication under a cellular communication protocol between the electronic device and a second user equipment; and a control unit configured to modulate and encode data to be transmitted based on the MCS information, wherein the communication unit further sends the modulated and encoded data to be transmitted to the second user equipment through the resource for the D2D communication.
According to another aspect of the present disclosure, there is provided an electronic device on a user equipment side in a wireless communication system, the electronic device including: a measurement unit, configured to measure base station devices included in the potential cell list; and a prediction unit for predicting a target base station device for a user equipment in a user equipment cluster performing device-to-device D2D communication based on a measurement result of the measurement unit.
According to another aspect of the present disclosure, there is provided a method for wireless communication in a wireless communication system, the method including: performing device-to-device D2D communication under a cellular communication protocol with a plurality of user devices through an electronic device on a user device side in the wireless communication system to directly transmit data and/or control information to the plurality of user devices; configuring a first user equipment and a second user equipment in the plurality of user equipments with a resource and a Modulation and Coding Scheme (MCS) for D2D communication between the first user equipment and the second user equipment, wherein the second user equipment is a candidate for D2D communication by the first user equipment; and transmitting information indicating the resources and the MCS to the first user equipment and the second user equipment.
According to another aspect of the present disclosure, there is provided a method for wireless communication in a wireless communication system, the method including: receiving, by an electronic device on a user equipment side in the wireless communication system, information indicating a resource and a modulation and coding scheme, MCS, for D2D communication under a cellular communication protocol between the electronic device and a second user equipment from the first user equipment; modulating and coding data to be transmitted based on the MCS information; and sending the modulated and encoded data to be transmitted to the second user equipment through the resource for the D2D communication.
According to another aspect of the present disclosure, there is provided a method for wireless communication in a wireless communication system, the method including: measuring, by an electronic device in a wireless communication system, base station devices included in a potential cell list; and predicting a target base station apparatus for a user equipment in the user equipment cluster performing the device-to-device D2D communication based on a result of the measurement.
With the electronic device on the user equipment side in the wireless communication system and the method for wireless communication in the wireless communication system according to the present disclosure, the assisting role of the cluster head is clarified and enhanced. For some special scenarios, for example, for slave DUE without LTE (Long Term Evolution) link with the legacy cellular network during D2D communication, the auxiliary function of the cluster head may guarantee an improved transition speed and reduced signaling overhead when transitioning from the D2D communication mode to the legacy cellular communication mode. In addition, for example, in a D2D broadcast or multicast communication scenario, the auxiliary function of the cluster head may help smoothly complete the switching flow from the D2D broadcast or multicast mode to the unicast communication mode.
Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
Drawings
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure. In the drawings:
fig. 1 is a schematic diagram illustrating a transition scenario of a D2D broadcast mode to a D2D unicast mode according to an embodiment of the present disclosure;
fig. 2 is a block diagram illustrating a structure of a user equipment according to an embodiment of the present disclosure;
fig. 3 is a block diagram illustrating a structure of a user equipment according to another embodiment of the present disclosure;
fig. 4 is a sequence diagram illustrating a method for communication mode transition in a wireless communication system according to an embodiment of the present disclosure;
fig. 5 is a sequence diagram illustrating a method for communication mode transition in a wireless communication system according to another embodiment of the present disclosure;
fig. 6 is a schematic diagram illustrating a transition scenario of the D2D communication mode to the cellular communication mode known to the inventors;
fig. 7 is a block diagram illustrating a structure of a user equipment according to another embodiment of the present disclosure;
fig. 8 is a sequence diagram illustrating a method for communication mode transition in a wireless communication system according to another embodiment of the present disclosure; and
fig. 9 is a block diagram of an exemplary structure of a general-purpose personal computer in which a method for communication mode conversion in a wireless communication system according to an embodiment of the present disclosure may be implemented.
While the disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the description herein of specific embodiments is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosure. It is noted that throughout the several views, corresponding reference numerals indicate corresponding parts.
Detailed Description
Examples of the present disclosure will now be described more fully with reference to the accompanying drawings. The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.
Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms, and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known structures, and well-known technologies are not described in detail.
The present disclosure relates to D2D (Device-to-Device) communication in a wireless communication network. The UE (User Equipment) related to the present disclosure includes, but is not limited to, a mobile terminal, a computer, a vehicle-mounted device, and other terminals having a wireless communication function. Further, the UE referred to in the present disclosure may also be the UE itself or a component therein, such as a chip. Furthermore, the base station referred to in the present disclosure may be, for example, an eNodeB or a component such as a chip in an eNodeB.
Fig. 1 illustrates a transition scenario of a D2D broadcast mode to a D2D unicast mode according to an embodiment of the present disclosure.
As shown in FIG. 1, within one D2D broadcast group, the source DUE (D2D User Equipment ) broadcasts information to the remaining DUEs (i.e., DUE1, DUE2, and DUE 3). When the broadcast link of DUE2 becomes poor (e.g., DUE2 moves away from the source DUE), and the quality of information transmission is not guaranteed, it needs to switch from the current D2D broadcast mode to another communication mode. The transition of the DUE from D2D broadcast mode to legacy cellular mode may guarantee its basic communication needs (continuous communication with the source DUE through the base station or communication with other nearby DUE through the base station). However, this conversion process incurs much signaling overhead. The inventors of the present disclosure believe that the basic communication needs can be met if the DUE2 switches from the D2D broadcast mode to the unicast communication mode with other DUE as well. For example, DUE2 may switch to unicast communication with a DUE1 that has learned the broadcast information to collect the information when it is still needed to learn the broadcast information from the source DUE, or a higher-level application of DUE2 may purposely switch to unicast communication with other DUE, e.g., DUE4, when the broadcast information is no longer of interest. The transition time and signaling may be reduced significantly compared to transitioning to the conventional cellular mode.
In the scenario shown in fig. 1, DUE1, DUE2, DUE4, and DUE5 constitute a DUE cluster. In this Cluster, DUE5 becomes CH (Cluster Head). The cluster head is a DUE which is linked with the network side in the cluster and can assist members in the cluster to carry out D2D communication mode conversion.
There is also a broadcast source DUE in fig. 1, which is a DUE that sends a broadcast message in a D2D broadcast communication. Other DUE's, such as DUE1, DUE2, and DUE3, are DUE's that receive broadcast messages in D2D broadcast communications. In addition, a DUE such as DUE4 in the illustration of fig. 1 (b) may be referred to as a new target DUE, which is a communication object when D2D unicast communication is established for a DUE such as DUE 2.
The scenario shown in fig. 1 is by way of example only, and the present disclosure is not limited thereto. For example, the source DUE and the cluster head may also be the same UE. In addition, in the scenario shown in fig. 1, there may also be a base station, such as an eNB (evolved Node base station) (not shown), which is a serving cell where the DUE (e.g., DUE2) and the cluster head are located, and may be a serving cell of a new target DUE, or may not be, that is, the new target DUE may be located in a neighboring cell of the DUE (e.g., DUE 2).
According to the embodiment of the disclosure, in a D2D broadcast cluster (D2D broadcastcluster) in which D2D broadcast communication is ongoing, for a cluster user such as DUE2, when the link quality between the DUE2 and the source DUE in which D2D broadcast communication is ongoing changes, i.e., the link quality is degraded, the DUE2 may switch from the D2D broadcast mode to the D2D unicast mode to ensure the integrity and continuity of information reception thereof. Meanwhile, as the broadcast cluster user receives the information from the same source DUE, namely the problems of information loss and the like are not considered, the broadcast cluster user theoretically obtains the same information. Thus, the target information that the user of the broadcast cluster who performs the transmission mode switching wishes to obtain may or may not be changed, i.e. for the user of the broadcast cluster, it may be switched to unicast communication with any user of the broadcast cluster.
Fig. 2 illustrates a structure of a UE200 according to an embodiment of the present disclosure. In this embodiment, the UE200 may act as a cluster head, like the DUE5 shown in fig. 1. As shown in fig. 2, the UE200 may include a communication unit 210 and a configuration unit 220. The UE200 may be implemented as a mobile terminal such as a smart phone, a tablet Personal Computer (PC), a notebook PC, a portable game terminal, a portable/cryptographic dog-type mobile router, and a digital camera, or a vehicle-mounted terminal such as a car navigation apparatus. The UE200 may also be implemented as a terminal (also referred to as a Machine Type Communication (MTC) terminal) that performs machine-to-machine (M2M) communication. Further, the UE200 may be a wireless communication module (such as an integrated circuit module including a single chip) mounted on each of the above-described terminals.
The communication unit 210 may communicate with a plurality of UEs (e.g., DUE1, DUE2, and DUE4 as shown in fig. 1) under a cellular communication protocol, D2D, to directly transmit data and/or control information to the plurality of UEs. The cellular communication protocol may be, for example, LTE-a (long Term Evolution advanced), LTE-U, etc., and the disclosure is not limited thereto.
Configuration unit 220 may configure resources and MCS (Modulation and Coding Scheme) for D2D communication between DUE2 and DUE4 for a first UE, such as DUE2 in fig. 1, and a second UE, such as DUE4 in fig. 1, of the plurality of UEs. Here, DUE4 is a candidate for D2D communication by DUE 2.
The communication unit 210 may transmit information indicating the resources and MCS to the DUE2 and the DUE 4.
In an example of the present invention, D2D has a default dedicated MCS for communication, and in such a case, configuration section 220 may not configure the MCS.
The indicated resource is, for example, Physical Resource Blocks (PRBs), and the MCS information is, for example, 5-bit I with a value range of 0 to 31MCS(MCS index value). Each IMCSCorresponding to a particular modulation scheme (e.g., QPSK, 16QAM, 64QAM), the modulation scheme may be characterized by a modulation order (modulation order); i isMCSAnd may also correspond to a particular Transport Block Size (TBS). Further, in some examples IMCSBut also to a particular redundancy version. Wherein, the corresponding relation between the MCS index value and the modulation order, the transport block size and the redundancy version can be in the form of a tableEmbodied and pre-stored in the chip of the DUE. In a specific example, the correspondence table of MCS index values and modulation orders, transport block sizes, and redundancy versions for D2D communication is the same as the table for PUSCH defined in the existing standard. In another example, the MCS index value for D2D communication may be a subset of the above 0-31, for example, the value range is limited to 10-20, so as to reduce the modulation and coding complexity between the DUE.
It is further noted that elements referred to in this description and in the appended claims may be physical or logical entities, and that elements referred to by different names may be implemented by one and the same physical entity. For example, the first transmitting unit and the second transmitting unit, which will be mentioned later in this specification, may be implemented by the same set of antennas, filters, modems, and the like physical entities.
According to an embodiment of the present disclosure, the UE200 acting as a cluster head DUE5 may configure resources (and possibly MCS) for D2D communication for DUE2 and DUE4 within the cluster, and thus may help smoothly complete the transition flow from D2D broadcast or multicast mode to unicast communication mode, or even from one D2D unicast communication object to another D2D unicast communication object.
According to an embodiment of the present disclosure, the communication unit 210 may also receive indication information indicating a link quality between the DUE2 and the DUE4, such as a measurement result of the DUE2 being measured, from the DUE 2. In another example, the cluster head UE200 makes measurements for DUE2 and obtains link quality indications between DUE2 and other DUE, e.g., DUE 4. In case the link quality indicated by the indication information satisfies the predetermined condition, the configuration unit 210 may configure the resource and MCS for D2D communication between DUE2 and DUE 4. In other words, the configuration unit 210 configures resources and MCS in consideration of link quality or channel quality between the DUE2 and the DUE4, radio condition (radio condition). In addition, the configuration unit 210 may also receive at least one of QoS requirements, buffer status (buffer status), interference situation, etc. of the current traffic from the DUE2 to consider the resource and MCS configuration. Therefore, the smooth proceeding of the conversion process can be ensured.
When, for example, the UE200 serving as the cluster head DUE5 is located within the service range of the base station apparatus, the communication unit may transmit, to the base station apparatus, the transition request information indicating that the DUE2 is to perform D2D communication with the DUE4, and may receive transition request acknowledgement information from the base station apparatus. For example, the UE200 determines whether the link quality between DUE2 and DUE4 satisfies a predetermined condition, and transmits transition request information to the base station apparatus when it is determined that the predetermined condition is satisfied, in order to reduce system overhead. Here, the conversion request information may further include at least one of QoS requirements of its current traffic, buffer status (buffer status), interference situation, etc., received from the DUE2, and the conversion request acknowledgement information may include resource allocation information for D2D communication between the DUE2 and the DUE 4. At this time, the configuration unit 220 may perform configuration based on at least the conversion request confirmation information. In one example, UE200 transmits the transition request information to the base station apparatus in higher layer signaling, e.g., an RRC message, and accordingly, the base station apparatus includes resource allocation information for D2D communication between DUE2 and DUE4 in the RRC message and feeds back to UE200, and UE200 parses at a higher layer to extract resource allocation information for D2D communication between DUE2 and DUE 4. Specifically, a scheduler (scheduler) located in the base station device determines resource allocation based on the link quality between DUE2 and DUE4, and at least one of QoS requirements, buffer status, interference situation, etc. of the traffic. As an example, a scheduler for D2D is specifically set in the base station device to allocate resources for D2D users in a semi-static manner.
On the other hand, when the UE200, for example, serving as the cluster head DUE5, is located outside the service range of the base station apparatus, the configuration unit 220 may select resources from a predetermined D2D communication resource pool to configure. In one example, the predetermined D2D communication resource pool is information pre-stored in a chip of the user equipment supporting D2D communication, such as a resource of a specific frequency band; in another example, when the UE200, e.g., serving as the cluster head DUE5, is located within the service range of the base station apparatus, the predetermined D2D communication resource pool is pre-specified by the base station apparatus, e.g., by RRC, and the UE200 may update the resource pool information by receiving an RRC message transmitted again by the base station apparatus. In this example, the UE200 may allocate resources for the D2D user without assistance of the base station device, and when the cluster head UE200 also receives a D2D communication requirement between other DUE managed by the cluster head UE200, the configuration unit 220 operates as a scheduler, for example, operating at the RRC layer or the MAC layer, that determines communication resources for each group of DUE from a resource pool based on link quality between the groups of DUE, and at least one of QoS requirements, buffer status, interference conditions, etc. of the traffic.
According to an embodiment of the present disclosure, the communication unit 210 may further receive indication information indicating a link quality between the DUE2 and a source DUE of a third UE, such as shown in fig. 1, from the DUE 2. In addition to assuming that D2D broadcast communication is in progress between DUE2 and the source DUE in advance, it may also be assumed that D2D unicast communication is in progress between DUE2 and the third UE in advance, and the disclosure is not particularly limited thereto. In any event, in such a case, the above-mentioned predetermined condition may include at least that the link quality between DUE2 and DUE4 is better than the link quality between DUE2 and the source DUE.
According to embodiments of the present disclosure, the communication unit 210 may also receive information from the DUE2 and/or DUE4 indicating that the source DUE is the broadcast information source of the DUE2 and DUE 4. At this time, in the event that a predetermined condition is satisfied, configuration unit 220 may determine that DUE2 is in unicast D2D communication with DUE4, such that DUE2 continues to obtain broadcast information from DUE 4. Further, the communication unit 210 may receive a transport frame number STATUS (SN STATUS) of DUE2 and the source DUE from DUE2 and send the transport frame number STATUS to DUE4 so that DUE2 continues to receive broadcast information of the source DUE from DUE 4.
According to an embodiment of the present disclosure, the configuring unit 220 may further configure HARQ (Hybrid Automatic Repeat Request) for performing communication between the DUE2 and D2D of the DUE 4. Specifically, the configuration unit 220 may configure parameters such as the frequency of HARQ feedback, for example, specify that feedback is performed once for n transport blocks (transport blocks), where n is an integer greater than 1. Further, the communication unit 210 may transmit the related HARQ configuration information to the DUE2 and the DUE 4.
According to an embodiment of the present disclosure, the configuration unit 220 may further configure the D2D communication connection assistance information for accessing the DUE4 for the DUE 2. The D2D communication connection assistance information may include, for example, RA preamble (Random Access preamble sequence), D2DRACH (Random Access Channel) resources, and the like. Further, the communication unit 210 may transmit the auxiliary information to the DUE 2.
According to an embodiment of the present disclosure, the communication unit 210 may transmit information indicating the Resource and the MCS to the DUE2 and the DUE4 through RRC (Radio Resource Control) signaling.
The structure of the UE200 acting as the cluster head DUE5 is described above in connection with fig. 2. The structure of a UE acting as a normal DUE within a cluster according to an embodiment of the present disclosure is described next. Fig. 3 illustrates a structure of a UE300 acting as a general DUE in a cluster, such as DUE2 shown in fig. 1. As shown in fig. 3, the UE300 may include at least a communication unit 310, a control unit 320, and the like.
The communication unit 310 may receive, from a first UE, such as DUE5 (acting as a cluster head) shown in fig. 1, information indicating resources and MCSs for D2D communication under a cellular communication protocol between the UE300 (such as DUE2 shown in fig. 1) and a second UE (such as DUE4 shown in fig. 1).
Based on the MCS information, the control unit 320 may modulate and encode data to be transmitted.
Here, the communication unit 310 may also send the modulated and encoded data to be transmitted to the DUE4 through the resource for D2D communication.
As shown in fig. 3, the UE300 may further include a measurement unit 330. The measurement unit 330 may measure the link quality between the UE300 (see DUE2 shown in fig. 1) and the DUE 4. Further, the communication unit 310 may transmit indication information of the link quality to the DUE5 serving as a cluster head.
According to embodiments of the present disclosure, a UE300 (e.g., DUE2 shown in fig. 1) may communicate with a third UE (e.g., a source DUE shown in fig. 1) in D2D before communicating with a DUE4 in D2D. In this case, the measurement unit 330 may measure the link quality between the UE300 (see DUE2 shown in fig. 1) and the source DUE. Further, the communication unit 310 may transmit indication information of the link quality to the DUE5 serving as a cluster head.
According to an embodiment of the present disclosure, the communication unit 310 may also receive at least one of the following information from the DUE5 acting as a cluster head: measurement configuration information for measuring link quality between the UE300 (DUE 2 shown in fig. 1) and the DUE 4; HARQ configuration information for D2D communication between the UE300 (DUE 2 as shown in fig. 1) and the DUE 4; and D2D communication connection assistance information to access DUE 4.
According to an embodiment of the present disclosure, the communication unit 310 may transmit D2D raperable to DUE4 through D2D RACH to access DUE4 based on the assistance information, and may receive an access response from DUE 4. Here, the access response may include at least one of a scheduling of the data to be transmitted and a timing advance. In this example, a scheduler may be provided at DUE4, and each transmission is specifically scheduled according to the resource configured by the cluster head and the MCS, for example, the resource configured by the cluster head is several time-frequency resource blocks, and the scheduler in DUE4 will specify which specific resource blocks carry data for each transmission.
According to an embodiment of the present disclosure, upon receiving the access response, the communication unit 310 may send acknowledgement information of successful establishment of D2D communication with DUE4 to the DUE5 acting as a cluster head, and stop receiving information from the source DUE.
According to an embodiment of the present disclosure, the communication unit 310 may receive broadcast information from a source DUE over a D2D broadcast link and send a transmission frame number status of the UE300 (DUE 2 as shown in fig. 1) with the source DUE to the DUE5 acting as a cluster head, establish unicast D2D communication with the DUE4 with the assistance of the DUE5, and continue to receive broadcast information from the DUE 4. Note that when the DUE2 is no longer concerned with broadcast information, the transmission frame number status with the source DUE may not be sent to the DUE5, and accordingly, the cluster head DUE5 does not inform the target DUE4 about the transmission frame number.
A procedure of communication transition in a wireless communication system according to an embodiment of the present disclosure is described below with reference to fig. 4 and 5. Fig. 4 shows a conversion flow of D2D broadcast to unicast within the coverage of the base station device according to an embodiment of the present disclosure, and fig. 5 shows a conversion flow of D2D broadcast to unicast outside the coverage of the base station device according to an embodiment of the present disclosure.
In the scenario of switching the D2D broadcast communication mode to the D2D unicast communication mode in the coverage area of the conventional cellular network, the main flow is as follows:
1. the DUE in D2D broadcast communication detects its broadcast link quality degradation, it will inform the Cluster Head (CH) of this message, and the cluster head will send the corresponding measurement configuration information to the DUE and the new target DUE;
2. when the DUE performs corresponding measurement by using the measurement configuration information, sending a measurement report to the cluster head, and the cluster head performs D2D communication mode switching decision according to the report, and sending a switching request to an evolved Node Base Station (eNB);
3, the eNB allocates resources for the DUE and the new target DUE, sends necessary information to the cluster head and confirms conversion; and
4. the cluster head sends the required configuration information to the DUE and the new target DUE, assisting the DUE to establish D2D unicast communication with the new target DUE.
Specifically, as shown in fig. 4, in step 1, the DUE detects that the D2D broadcast link quality is degraded, and sends corresponding information to the cluster head.
Next, in step 2, the cluster head sends configuration information to the DUE for performing corresponding measurement, and the cluster head configures a new target DUE to send a reference signal for DUE measurement, where the configuration information includes, for example, physical resource information for sending/receiving the reference signal.
Next, in step 3, the DUE takes the corresponding measurements and sends a measurement report to the cluster head.
Next, in step 4, the Cluster Head (CH) makes a transition decision based on the measurement report sent by the DUE and the intra-cluster radio resource management.
Next, in step 5, the cluster head sends a SWITCH REQUEST message to the eNB, carrying the necessary information for the DUE to unicast communication with D2D. This information may include, for example: ID of DUE; ID of the new target DUE; and a radio access bearer context (E-rabbcontext) mainly including necessary Radio Network Layer (RNL) and Transport Network Layer (TNL) addressing information, Qos profile of radio access bearer, etc.
Next, in step 6, the eNB performs admission control. Specifically, the eNB determines whether resources required for communication can be guaranteed according to Qos information of the radio bearer transmitted by the CH. The eNB then dynamically allocates resources according to the Qos requirements. In addition, when the new target DUE belongs to the neighboring cell, the eNB needs to interact with the serving base station of the new target DUE through the X2 interface, discussing the resource allocation problem.
Next, in step 7, the eNB prepares to SWITCH and sends a SWITCH REQUEST ACKNOWLEDGE message to the CH, which carries the information needed by the DUE to make the D2D communication mode SWITCH. The message content mainly comprises: resource allocation guarantees; a default D2D RACH preamble for establishing a random connection between the DUE and the new target DUE; and other parameters such as D2D unicast access parameters.
Next, in step 8, the cluster head configures and sends configuration information to the DUE and the new target DUE. Specifically, the cluster head may generate an RRCConnectionReconfiguration message including a mobilityControlInformation message. The message content mainly comprises: resource allocation; modulation Coding Scheme (MCS); HARQ of D2D unicast, and the like; and an SN STATUS TRANSFER message, a frame number reception STATUS on the PDCP layer sent to the new target DUE.
It should be noted that in some examples, HARQ may also be supported under D2D broadcast communication, and HARQ (re-) transmission may be blindly integrated by contacting time resources through the HARQ entity. When D2D communication is switched from broadcast to unicast, HARQ needs to be reconfigured to meet its communication needs.
Next, in step 9, according to the RRCConnectionReconfiguration message (including mobility control information) sent by the cluster head, the DUE accesses to the new target DUE by means of D2D random access, and obtains synchronization of the DUE to the new target DUE in the direction of the new target DUE.
Next, in step 10, the new targeted DUE sends an access response to the DUE. Transmitting the information content may include: SA (scheduling arrangement) which mainly instructs where and how the new target DUE sends D2D information to the DUE; and TA (time advance).
Next, in step 11, when the DUE is successfully accessed to the new target DUE, the DUE sends an rrcconnectionreconfiguration complete message to the CH and the new target DUE, respectively, confirming that the D2D communication mode conversion is completed. At this time, the new target DUE verifies the received RRCConnectionReconfigurationComplete message, which may then send data to the DUE.
Finally, in step 12, the DUE releases the resources associated with the D2D broadcast communication and the conversion flow ends.
On the other hand, in the scenario that the D2D broadcast communication mode is switched to the D2D unicast communication mode without the coverage of the conventional cellular network, the main flow is as follows:
1. the DUE in D2D broadcast communication detects the quality of its broadcast link is degraded, it will inform the Cluster Head (CH) of this message, then the cluster head will send the corresponding measurement configuration information to the DUE and the new target DUE;
the CH makes a decision of communication mode conversion according to the measurement report of the DUE, and then it performs resource allocation of the DUE and a new target DUE in a resource pool according to pre-configuration; and
3. based on the obtained configuration information, the DUE enables the conversion of D2D broadcast communications to unicast communications with the new target DUE.
Specifically, as shown in fig. 5, in step 1, the DUE detects that the D2D broadcast link quality is degraded, and sends corresponding information to the cluster head.
Next, in step 2, the cluster head performs measurement control. Specifically, the cluster head sends configuration information to the DUE for performing corresponding measurement. Further, the cluster head configures a new target DUE to send a reference signal for DUE measurement.
Next, in step 3, the DUE takes the corresponding measurements and sends a measurement report to the cluster head.
Next, in step 4, the Cluster Head (CH) makes a transition decision based on the measurement report sent by the DUE and the intra-cluster radio resource management.
Next, in step 5, the cluster head performs admission control. Specifically, the CH determines whether the resources required for communication can be guaranteed in the preconfigured resource pool according to the received Qos information of the radio bearer. The CH then allocates resources to it according to the Qos requirements and the conditions in the pre-configured resource pool.
Next, in step 6, the cluster head configures the DUE and the new target DUE. Specifically, the cluster head generates an RRCConnectionReconfiguration message including a mobilityControlInformation message. The message content mainly comprises: resource allocation; modulation Coding Scheme (MCS); HARQ of D2D unicast, and the like; and an SN status ranging message, a frame number reception status on the PDCP layer sent to the new target DUE.
It should be noted that D2D may also support HARQ under broadcast communication, and the HARQ (re-) transmission is blindly integrated by the HARQ entity in relation to time resources. When D2D communication is switched from broadcast to unicast, HARQ needs to be reconfigured to meet its communication needs.
Next, in step 7, according to the RRCConnectionReconfiguration message (including mobility control information) sent by the cluster head, the DUE accesses to the new target DUE by means of D2D random access, and obtains synchronization of the DUE to the new target DUE in the direction of the new target DUE.
Next, in step 8, the new target DUE sends an access response to the DUE. The transmitting of the information content includes: SA (scheduling arrangement) which mainly instructs where and how the new target DUE sends D2D information to the DUE; and TA (time advance).
Next, in step 9, when the DUE is successfully accessed to the new target DUE, the DUE sends an rrcconnectionreconfiguration complete message to the CH and the new target DUE, respectively, confirming that the D2D communication mode conversion is completed. At this time, the new target DUE verifies the received RRCConnectionReconfigurationComplete message, which may then send data to the DUE.
Finally, in step 10, the DUE releases the resources associated with the D2D broadcast communication and the conversion flow ends.
The above describes a scenario in which the D2D broadcast communication mode is converted into the D2D unicast communication mode. The following describes a scenario in which the short-range D2D communication mode is switched to a conventional cellular communication mode.
Fig. 6 shows a scenario for a transition of the D2D communication mode to the cellular communication mode. As shown in fig. 6, the slave D2D user (slave DUE) is in D2D communication mode, which is in LTE-DETACH state. When the whole cluster has strong mobility (such as a high-speed rail scene), if the slave DUE maintains a link with the base station, a large signaling overhead will be brought. If the subordinate DUE is in the LTE-DETACH state, only the control link is kept with the cluster head, and unnecessary signaling overhead can be saved.
In the present embodiment, a subordinate DUE refers to a UE within a close range D2D communication cluster that does not maintain a cellular link with its serving base station. A cluster head refers to a UE within one close range D2D communication cluster that maintains a cellular link with its serving base station. In addition, the target base station refers to a target base station to which the subordinate DUE is to be connected during the handover process.
In conventional handover procedures without cluster head assistance known to the inventors of the present disclosure, since cell search and cell selection are performed by subordinate DUE, time is generally longer and there is more signaling overhead between the network and the UE.
In order to overcome the problem of more signaling overhead between the network and the UE in the conventional handover procedure, the present disclosure provides an electronic device on the UE side in a wireless communication system, which can enhance the auxiliary function of a cluster head, thereby reducing the signaling overhead between the network and a subordinate DUE.
Fig. 7 illustrates a structure of a UE800 according to another embodiment of the present disclosure. The UE800 may act as a cluster head as shown in fig. 6. As shown in fig. 7, the UE800 may include at least a measurement unit 810, a prediction unit 820, and the like.
The measurement unit 810 may perform measurement on the base station apparatuses included in the potential cell list. The potential target cell of the subordinate DUE is stored in a potential cell list (potential cell list), which may include a source base station of a cluster head, a cell stored in the subordinate DUE, a cell stored in the cluster head, and a neighboring cell, etc.
Based on the measurement results of the measurement unit 810, the prediction unit 820 may predict a target base station apparatus for the subordinate DUE in the UE cluster performing D2D communication.
According to an embodiment of the present disclosure, since an auxiliary function of a cluster head is enhanced, signaling overhead between a network and a slave DUE may be reduced.
As shown in fig. 7, the UE800 may further include a receiving unit 830 as a first receiving unit. The receiving unit 830 may receive transition request information indicating a transition from the D2D communication mode to the legacy cellular communication mode from the slave DUE. Here, the conversion request information may contain information on a potential cell list.
Further, as shown in fig. 7, the UE800 may further include a transmission unit 840 as a first transmission unit, a reception unit 850 as a second reception unit, and a transmission unit 860 as a second transmission unit.
The transmitting unit 840 may transmit random access preamble information to the target base station apparatus.
Next, the receiving unit 850 may receive random access response information from the target base station apparatus.
Based on the random access response information, the transmitting unit 860 may transmit the conversion response information to the subordinate DUE.
According to an embodiment of the present disclosure, when the random access response information indicates that the access is unsuccessful, the prediction unit 810 may predict a further target base station device from the remaining base station devices included in the potential cell list until the access is successful.
According to an embodiment of the present disclosure, when all access of all base station devices included in the potential cell list is unsuccessful, the transmitting unit 860 may transmit information indicating that a conventional transition from the D2D communication mode to the conventional cellular communication mode is made to the subordinate DUE.
According to an embodiment of the present disclosure, when the random access response information still indicates that the access is unsuccessful after a predetermined time has elapsed since the reception of the conversion request information by the reception unit 830, the transmission unit 860 may transmit information indicating that the conventional conversion from the D2D communication mode to the conventional cellular communication mode is performed to the slave DUE.
A procedure for communication transition in a wireless communication system according to another embodiment of the present disclosure is described below with reference to fig. 8. Fig. 8 illustrates a transition flow of a D2D communication mode to a conventional cellular communication mode with cluster head assistance according to another embodiment of the present disclosure.
In the scenario of D2D communication mode with cluster head assistance to the conventional cellular communication mode, the basic flow is as follows:
1. the subordinate DUEs are connected to the target cell with the aid of the cluster head; the cluster head can help the subordinate DUE to realize conversion quickly through virtual random access;
2. if the assisted random access is successful, the cluster head may gather system information and may notify the subordinate DUE: the system information sent by the target base station can be used for connecting with the target base station; and
3. if the cluster head fails randomly to assist before the transition assist timer expires or within the transition assist threshold, the slave DUE triggers the conventional non-cluster head assisted transition procedure.
Specifically, as shown in fig. 8, in step 0, D2D communication similar to cellular communication is performed between the slave DUE and the cluster head, and a conventional cellular communication link exists between the cluster head and the base station.
Next, in step 1, the slave DUE sends a switch request to the cluster head to indicate that the slave DUE is ready to switch from the D2D mode to the cellular mode. Here, the slave DUE sets a switchAssistanceTimer (transition assistance timer) for indicating an assistance time of the cluster head. If the slave DUE does not receive a switch reply for the cluster head before the timer expires, the slave DUE will trigger a conventional switch. The switch request (handover request) issued by the subordinate DUE includes a cell information list in which radio bearer information before D2D communication is stored.
Next, in step 2, the cluster head prepares a switching flow. In particular, from measurements of base stations (from the potential cell list), the cluster head can predict the best target base station for the subordinate DUE. The cluster head may manage switching assistance information for storing assistance information for the dependent DUE. In addition, the cluster head may also count the SwitchAssistanceThreshold (switching assist threshold). If the cluster head fails to complete the secondary random access successfully when the switch assistance threshold is | (number of cells in the potential cell list), the cluster head informs the subordinate DUE to start of the conventional handover procedure.
Next, in step 3, the cluster head sends an RA Preamble (random access Preamble sequence) to the target base station.
Next, in step 4, the target base station performs admission control (admission control).
Next, in step 5, the target base station transmits a random access Response (RA Response) to the cluster head. Specifically, the cluster head receives the RA Response, and records the UL Grant (uplink Grant), timing advance indication (time advance indication), and temporal C-RNTI (temporary cell radio network temporary representation) in the switchAssitanceInformation.
Next, in step 6, the cluster head sends a switch response (switch acknowledgement) containing the switch assitanceinformation to the slave DUE. The contents of the conversion response may include, for example, UL Grant, Timing advance indication, cell information (e.g., PLMN (Public Land Mobile Network), cell ID, carrier frequency, legacy system information in MIB and SIB, etc.), temporal C-RNTI, and the like.
Next, in step 7, an RRC procedure is performed between the subordinate DUE and the target base station. Specifically, the subordinate DUE may transmit an RRCConnectionRequest (RRC connection request) to the target base station. Then, the target base station may transmit RRCConnectionSetup (RRC connection configuration) to the subordinate DUE. After that, the subordinate DUE may transmit RRCConnectionSetupComplete (RRC connection configuration complete) to the target base station.
Next, in step 8, the target base station may send signaling on user context release (UE contextrelease) to the cluster head. Here, the target base station notifies the cluster head that the switching is successful, and the cluster head triggers the release of resources.
Next, in step 9, the cluster head releases the D2D resource, i.e. releases the radio resource, the user data plane resource and the control data plane resource related to the slave DUE for mode transition.
Next, in step 10, the cluster head sends a switch request acknowledge (switch request acknowledge) to the slave DUE. At this time, the slave DUE receives a switch request Acknowledge, indicating that the switch was successful.
A method for wireless communication in a wireless communication system is described next. The method comprises the following steps: performing, by an electronic device on a UE side in the wireless communication system, D2D communication under a cellular communication protocol with a plurality of UEs to directly transmit data and/or control information to the plurality of UEs; configuring a first UE and a second UE of the plurality of UEs with resources and MCSs for D2D communication between the first UE and the second UE, wherein the second UE is a candidate for D2D communication by the first UE; and transmitting information indicating the resources and the MCS to the first UE and the second UE.
Preferably, indication information indicating link quality between the first UE and the second UE may be received from the first UE, and the resource and MCS for D2D communication between the first UE and the second UE may be configured if the link quality indicated by the indication information satisfies a predetermined condition.
Preferably, when the electronic device is within the service range of the base station device, transition request information indicating that the first UE is to be in D2D communication with the second UE may be transmitted to the base station device, and transition request acknowledgement information containing resource allocation information for D2D communication between the first UE and the second UE may be received from the base station device and may be configured based at least on the transition request acknowledgement information.
Preferably, when the electronic device is located outside the service range of the base station device, the resource may be selected from a predetermined D2D communication resource pool for configuration.
Preferably, the indication information indicating the link quality between the first UE and the third UE may be received from the first UE, and the predetermined condition includes at least that the link quality between the first UE and the second UE is better than the link quality between the first UE and the third UE.
Preferably, information indicating that the third UE is a broadcast information source of the first UE and the second UE may be received from the first UE and/or the second UE, and in case a predetermined condition is satisfied, it may be determined that the first UE is in unicast D2D communication with the second UE, and a transmission frame number status of the first UE and the third UE may be received from the first UE and transmitted to the second UE, so that the first UE continues to collect broadcast information of the third UE from the second UE.
Preferably, HARQ for D2D communication between the first UE and the second UE may be further configured, and related HARQ configuration information may be transmitted to the first UE and the second UE.
Preferably, the first UE may be further configured with D2D communication connection assistance information for accessing the second UE, and the assistance information may be sent to the first UE.
Preferably, the information indicating the resources and the MCS may be transmitted to the first UE and the second UE through RRC signaling.
Another method for wireless communication in a wireless communication system is described next. The method comprises the following steps: receiving, by an electronic device on a UE side in the wireless communication system, information indicating a resource and MCS for D2D communication under a cellular communication protocol between the electronic device and a second UE from a first UE; modulating and coding data to be transmitted based on the MCS information; and sending the modulated and encoded data to be transmitted to the second UE over the resources for the D2D communication.
Preferably, the method may further comprise: the link quality between the electronic device and the second UE is measured and an indication of the link quality is sent to the first UE.
Preferably, the electronic device may communicate with the third UE at D2D before communicating with the second UE at D2D, may measure link quality between the electronic device and the third UE, and may send an indication of the link quality to the first UE.
Preferably, at least one of the following information may be received from the first UE: measurement configuration information for measuring link quality between the electronic device and the second UE; HARQ configuration information for D2D communication between the electronic device and the second UE; and accessing D2D communication connection assistance information for the second UE.
Preferably, the assistance information may be transmitted to the second UE for accessing the second UE, and an access response may be received from the second UE, wherein the access response may include at least one of a scheduling and a timing advance for data to be transmitted.
Preferably, after receiving the access response, confirmation information of successful D2D communication establishment with the second UE may be sent to the first UE, and reception of information from the third UE may be stopped.
Preferably, the broadcast information may be received from the third UE over the D2D broadcast link and the transmission frame number status of the electronic device with the third UE is sent to the first UE, a unicast D2D communication is established with the second UE with the assistance of the first UE, and the broadcast information continues to be received from the second UE.
Another method for wireless communication in a wireless communication system is described next. The method comprises the following steps: measuring, by an electronic device on a UE side in a wireless communication system, a base station device included in a potential cell list; and predicting a target base station device for the UEs in the cluster of UEs performing D2D communication based on the results of the measurement.
Preferably, the method may further comprise: receiving, from the UE, transition request information indicating a transition from the D2D communication mode to a legacy cellular communication mode, wherein the transition request information contains information about a potential cell list.
Preferably, the method may further comprise: sending random access lead code information to target base station equipment; receiving random access response information from the target base station equipment; and transmitting the switching response information to the UE based on the random access response information.
Preferably, when the random access response information indicates that the access is unsuccessful, a further target base station device may be predicted from the remaining base station devices included in the potential cell list until the access is successful.
Preferably, when all of the base station devices included in the potential cell list are unsuccessfully accessed, information indicating that a conventional transition from the D2D communication mode to the conventional cellular communication mode is made may be transmitted to the UE.
Preferably, when the random access response information still indicates that the access is unsuccessful after a predetermined time has elapsed since the reception of the handover request information, information indicating that a conventional handover from the D2D communication mode to the conventional cellular communication mode is to be made may be transmitted to the UE.
Various specific implementations of the above-mentioned steps of the method for wireless communication in a wireless communication system according to the embodiments of the present disclosure have been described in detail above, and a description thereof will not be repeated.
According to an embodiment of the present disclosure, there may also be provided an electronic device including processing circuitry configured to perform operations of: performing D2D communication under a cellular communication protocol with a plurality of UEs to transmit data and/or control information directly to the plurality of UEs; configuring a first UE and a second UE of the plurality of UEs with resources and MCSs for D2D communication between the first UE and the second UE, wherein the second UE is a candidate for D2D communication by the first UE; and transmitting information indicating the resources and the MCS to the first UE and the second UE.
According to an embodiment of the present disclosure, there may also be provided an electronic device including processing circuitry configured to perform operations of: receiving, from a first UE, information indicating resources and MCS for D2D communication under a cellular communication protocol between the electronic device and a second UE; modulating and coding data to be transmitted based on the MCS information; and sending the modulated and encoded data to be transmitted to the second UE over the resources for the D2D communication.
According to an embodiment of the present disclosure, there may also be provided an electronic device including processing circuitry configured to perform operations of: measuring base station equipment included in the potential cell list; and predicting a target base station device for the UEs in the cluster of UEs performing D2D communication based on the results of the measurement.
It should be understood that the electronic device may also execute other technical solutions of the present disclosure, which are described above and are not described herein for brevity.
It is apparent that the respective operational procedures of the method for wireless communication in a wireless communication system according to the present disclosure may be implemented in the form of computer-executable programs stored in various machine-readable storage media.
Moreover, the object of the present disclosure can also be achieved by: a storage medium storing the above executable program code is directly or indirectly supplied to a system or an apparatus, and a computer or a Central Processing Unit (CPU) in the system or the apparatus reads out and executes the program code. At this time, as long as the system or the apparatus has a function of executing a program, the embodiments of the present disclosure are not limited to the program, and the program may also be in any form, for example, an object program, a program executed by an interpreter, a script program provided to an operating system, or the like.
Such machine-readable storage media include, but are not limited to: various memories and storage units, semiconductor devices, magnetic disk units such as optical, magnetic, and magneto-optical disks, and other media suitable for storing information, etc.
In addition, the computer can also implement the technical solution of the present disclosure by connecting to a corresponding website on the internet, downloading and installing the computer program code according to the present disclosure into the computer and then executing the program.
Fig. 9 is a block diagram of an exemplary structure of a general-purpose personal computer in which a method for wireless communication in a wireless communication system according to an embodiment of the present disclosure may be implemented.
As shown in fig. 9, a CPU 1301 executes various processes in accordance with a program stored in a Read Only Memory (ROM)1302 or a program loaded from a storage portion 1308 to a Random Access Memory (RAM) 1303. In the RAM 1303, data necessary when the CPU 1301 executes various processes and the like is also stored as necessary. The CPU 1301, the ROM 1302, and the RAM 1303 are connected to each other via a bus 1304. An input/output interface 1305 is also connected to bus 1304.
The following components are connected to the input/output interface 1305: an input portion 1306 (including a keyboard, a mouse, and the like), an output portion 1307 (including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker, and the like), a storage portion 1308 (including a hard disk, and the like), a communication portion 1309 (including a network interface card such as a LAN card, a modem, and the like). The communication section 1309 performs communication processing via a network such as the internet. A driver 1310 may also be connected to the input/output interface 1305, as desired. A removable medium 1311 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 1310 as needed, so that a computer program read out therefrom is installed in the storage portion 1308 as needed.
In the case where the above-described series of processes is realized by software, a program constituting the software is installed from a network such as the internet or a storage medium such as the removable medium 1311.
It should be understood by those skilled in the art that such a storage medium is not limited to the removable medium 1311 shown in fig. 9 in which the program is stored, distributed separately from the apparatus to provide the program to the user. Examples of the removable medium 1311 include a magnetic disk (including a floppy disk (registered trademark)), an optical disk (including a compact disc read only memory (CD-ROM) and a Digital Versatile Disc (DVD)), a magneto-optical disk (including a Mini Disk (MD) (registered trademark)), and a semiconductor memory. Alternatively, the storage medium may be the ROM 1302, a hard disk contained in the storage section 1308, or the like, in which programs are stored and which are distributed to users together with the apparatus containing them.
As described above, the present disclosure proposes an electronic device on a user equipment side in a wireless communication system and a method for wireless communication in the wireless communication system, so that an assisting role of a cluster head is enhanced.
According to the design of the present disclosure as described above, many procedures such as cell search, cell reselection, random access, etc. can be avoided for the dependent DUE, so that signaling overhead can be reduced, and the transition from the D2D mode to the conventional cellular mode can be realized more quickly.
In the systems and methods of the present disclosure, it is apparent that individual components or steps may be broken down and/or recombined. These decompositions and/or recombinations are to be considered equivalents of the present disclosure. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
Although the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, it should be understood that the above-described embodiments are merely illustrative of the present disclosure and do not constitute a limitation of the present disclosure. It will be apparent to those skilled in the art that various modifications and variations can be made in the above-described embodiments without departing from the spirit and scope of the disclosure. Accordingly, the scope of the disclosure is to be defined only by the claims appended hereto, and by their equivalents.

Claims (14)

1. An electronic device on a user equipment side in a wireless communication system, comprising:
a communication unit configured to communicate device-to-device D2D under a cellular communication protocol with a plurality of user devices to transmit data and/or control information directly to the plurality of user devices; and
a configuration unit configured to configure a resource and a Modulation and Coding Scheme (MCS) for D2D communication between a first user equipment and a second user equipment in the plurality of user equipments, wherein the second user equipment is a candidate for D2D communication by the first user equipment,
wherein the communication unit transmits information indicating the resources and the MCS to the first user equipment and the second user equipment,
wherein the communication unit is further configured to receive indication information from the first user equipment indicating link quality between the first user equipment and the second user equipment, and the configuration unit configures resources and MCS for D2D communication between the first user equipment and the second user equipment if the link quality indicated by the indication information satisfies a predetermined condition, and
wherein the communication unit is further configured to receive indication information from the first user equipment indicating a link quality between the first user equipment and a third user equipment, and the predetermined condition comprises at least that the link quality between the first user equipment and the second user equipment is better than the link quality between the first user equipment and the third user equipment.
2. The electronic device of claim 1, wherein the communication unit is further configured to transmit a transition request information to a base station device indicating that the first user device is to be in D2D communication with the second user device, and to receive a transition request acknowledgement information from the base station device, the transition request acknowledgement information containing resource allocation information for D2D communication between the first user device and the second user device, and
wherein the configuration unit performs configuration based on at least the conversion request confirmation information.
3. The electronic device according to claim 1, wherein the configuration unit is further configured to select a resource for configuration from a predetermined pool of D2D communication resources.
4. The electronic device of claim 1, wherein the communication unit further receives information from the first user device and/or the second user device indicating that the third user device is a broadcast information source for the first user device and the second user device, and
wherein, in case that the predetermined condition is satisfied, the configuration unit determines that the first user equipment is in unicast D2D communication with the second user equipment, and the communication unit receives a transmission frame number status of the first user equipment and the third user equipment from the first user equipment and transmits the transmission frame number status to the second user equipment, so that the first user equipment continues to collect broadcast information of the third user equipment from the second user equipment.
5. The electronic device of claim 1, wherein the configuration unit is further configured to perform hybrid automatic repeat request, HARQ, for D2D communication of the first and second user equipment, and the communication unit transmits related HARQ configuration information to the first and second user equipment.
6. The electronic device of claim 1, wherein the configuration unit is further to configure the first user device with D2D communication connection assistance information for accessing the second user device, and the communication unit is to transmit the assistance information to the first user device.
7. The electronic device of claim 1, wherein the communication unit transmits information indicating the resources and the MCS to the first user device and the second user device through RRC signaling.
8. An electronic device on a user equipment side in a wireless communication system, comprising:
a communication unit configured to receive, from a first user equipment, information indicating a resource and a modulation and coding scheme, MCS, for D2D communication under a cellular communication protocol between the electronic device and a second user equipment;
a control unit configured to modulate and encode data to be transmitted based on the MCS information, wherein the communication unit further sends the modulated and encoded data to be transmitted to the second user equipment through the resource for the D2D communication; and
a measurement unit configured to measure a link quality between the electronic device and the second user equipment, wherein the communication unit transmits the indication information of the link quality to the first user equipment,
wherein the electronic device is in D2D communication with a third user device prior to D2D communication with the second user device,
the measurement unit is further configured to measure a link quality between the electronic device and the third user equipment, and
the communication unit sends the indication information of the link quality to the first user equipment.
9. The electronic device of claim 8, wherein the communication unit is further to receive at least one of the following information from the first user device: measurement configuration information for measuring link quality between the electronic device and the second user equipment; hybrid automatic repeat request, HARQ, configuration information for D2D communication between the electronic device and the second user equipment; and accessing D2D communication connection assistance information of the second user equipment.
10. The electronic device of claim 9, wherein the communication unit transmits the assistance information to the second user equipment for access to the second user equipment and receives an access response from the second user equipment, wherein the access response includes at least one of a scheduling and a timing advance of data to be transmitted.
11. The electronic device according to claim 10, wherein, upon receiving an access response, the communication unit transmits confirmation information to the first user device that D2D communication was successfully established with the second user device, and stops receiving information from the third user device.
12. The electronic device of claim 8, wherein the communication unit receives broadcast information from the third user device over a D2D broadcast link and transmits a transmission frame number status of the electronic device with the third user device to the first user device, establishes a unicast D2D communication with the second user device with the assistance of the first user device, and continues to receive the broadcast information from the second user device.
13. A method for wireless communication in a wireless communication system, comprising:
performing device-to-device D2D communication under a cellular communication protocol with a plurality of user devices through an electronic device on a user device side in the wireless communication system to directly transmit data and/or control information to the plurality of user devices;
configuring a first user equipment and a second user equipment in the plurality of user equipments with a resource and a Modulation and Coding Scheme (MCS) for D2D communication between the first user equipment and the second user equipment, wherein the second user equipment is a candidate for D2D communication by the first user equipment;
transmitting information indicating the resources and the MCS to the first user equipment and the second user equipment;
receiving indication information from the first user equipment indicating link quality between the first user equipment and the second user equipment, and configuring resources and MCS for D2D communication between the first user equipment and the second user equipment if the link quality indicated by the indication information meets a predetermined condition; and
receiving, from the first user equipment, indication information indicating a link quality between the first user equipment and a third user equipment, and the predetermined condition includes at least that the link quality between the first user equipment and the second user equipment is better than the link quality between the first user equipment and the third user equipment.
14. A method for wireless communication in a wireless communication system, comprising:
receiving, by an electronic device on a user equipment side in the wireless communication system, information indicating a resource and a modulation and coding scheme, MCS, for D2D communication under a cellular communication protocol between the electronic device and a second user equipment from the first user equipment;
modulating and coding data to be transmitted based on the MCS information;
sending the modulated and coded data to be transmitted to the second user equipment through the resource for the D2D communication;
measuring a link quality between the electronic device and the second user equipment;
sending the indication information of the link quality to the first user equipment;
communicating with a third user device D2D prior to communicating with the second user device D2D;
measuring a link quality between the electronic device and the third user equipment; and
and sending the indication information of the link quality to the first user equipment.
CN201410269832.3A 2014-06-17 2014-06-17 Electronic device and wireless communication method on user equipment side in wireless communication system Active CN105338464B (en)

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CN201410269832.3A CN105338464B (en) 2014-06-17 2014-06-17 Electronic device and wireless communication method on user equipment side in wireless communication system
KR1020177000390A KR20170020421A (en) 2014-06-17 2015-06-09 Electronic device on user equipment side in wireless communication system and wireless communication method
US15/310,329 US10327227B2 (en) 2014-06-17 2015-06-09 Electronic device on user equipment side in wireless communication system and wireless communication method
PCT/CN2015/081048 WO2015192726A1 (en) 2014-06-17 2015-06-09 Electronic device on user equipment side in wireless communication system and wireless communication method
JP2016572540A JP6540717B2 (en) 2014-06-17 2015-06-09 Electronic device and wireless communication method of user device side in wireless communication system
EP15809333.6A EP3160202B1 (en) 2014-06-17 2015-06-09 Electronic device on user equipment side in wireless communication system
US16/400,042 US10849107B2 (en) 2014-06-17 2019-05-01 Electronic device on user equipment side in wireless communication system and wireless communication method

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Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105338464B (en) * 2014-06-17 2020-10-20 索尼公司 Electronic device and wireless communication method on user equipment side in wireless communication system
CN106793148B (en) * 2015-11-20 2021-11-30 中兴通讯股份有限公司 Random access method and device
US10687268B2 (en) * 2016-01-12 2020-06-16 Sony Corporation Terminal device, infrastructure equipment and methods for resource selection and updating of access class information
EP3424263B1 (en) * 2016-04-01 2020-08-19 Sony Corporation Communications device, infrastructure equipment and method
CN113708909A (en) * 2016-04-28 2021-11-26 索尼集团公司 Uplink pilot signal receiving method and uplink report message receiving method
US11277866B2 (en) * 2016-05-27 2022-03-15 Ntt Docomo, Inc. Communication device and random access control method
US9986446B2 (en) * 2016-05-31 2018-05-29 Apple Inc. Providing special radio provisions to link budget limited user equipment at activation
US10517021B2 (en) 2016-06-30 2019-12-24 Evolve Cellular Inc. Long term evolution-primary WiFi (LTE-PW)
CN110352617B (en) * 2016-09-29 2022-04-22 杜塞尔多夫华为技术有限公司 Method and apparatus for time synchronization of multi-link D2D and cellular communications
KR20190086492A (en) * 2016-11-25 2019-07-22 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 Data transmission methods and devices
CN116801407A (en) * 2017-05-04 2023-09-22 皇家飞利浦有限公司 UE group, UE group manager UE and UE group member UE
CN108650657B (en) * 2018-04-20 2021-02-26 京东方科技集团股份有限公司 Content distribution method, content updating method and related devices in Internet of vehicles
WO2019237302A1 (en) * 2018-06-14 2019-12-19 北京小米移动软件有限公司 Information transmission method, device and system and storage medium
WO2019240544A1 (en) * 2018-06-14 2019-12-19 Lg Electronics Inc. Method and apparatus for performing sidelink communication by ue in nr v2x
WO2020031282A1 (en) * 2018-08-07 2020-02-13 富士通株式会社 Terminal device, base station device, radio communication system, and radio communication method
CN115484685A (en) * 2018-09-27 2022-12-16 维沃移动通信有限公司 Method for allocating capacity and resource, terminal equipment and control equipment
US10897792B2 (en) * 2018-09-28 2021-01-19 Mediatek Inc. Method and apparatus of new radio V2X cluster head
US11239941B2 (en) * 2019-01-20 2022-02-01 Qualcomm Incorporated Feedback techniques for wireless communications
KR102658886B1 (en) 2019-02-14 2024-04-18 삼성전자 주식회사 Method and apparatus for performing user equipment capability procedure for supporting vehicle communication in next generation mobile communication system
EP3979726A4 (en) * 2019-05-28 2022-05-25 Beijing Xiaomi Mobile Software Co., Ltd. Method and device for transmission time adjustment and configuration
CN110876170A (en) * 2019-12-16 2020-03-10 北京码牛科技有限公司 Intelligent community management method and alarm system based on public information
US20230008931A1 (en) * 2019-12-16 2023-01-12 Telefonaktiebolaget Lm Ericsson (Publ) Reliable device-to-device communication
WO2023247705A1 (en) * 2022-06-24 2023-12-28 Continental Automotive Technologies GmbH Method and system for massive initial access management

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101594632A (en) * 2009-06-29 2009-12-02 深圳华为通信技术有限公司 The methods, devices and systems that switch the sub-district
WO2013044864A1 (en) * 2011-09-29 2013-04-04 华为技术有限公司 Method and device for communication mode switchover

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2384598B1 (en) * 2009-01-16 2018-05-23 Nokia Technologies Oy Apparatus and method ofscheduling resources for device-to-device communications
US8504052B2 (en) * 2010-05-06 2013-08-06 Nokia Corporation Measurements and fast power adjustments in D2D communications
CN102647246B (en) * 2011-02-22 2014-08-13 上海无线通信研究中心 D2D (Dimension To Dimension) pair/D2D cluster communication building method
WO2012159270A1 (en) * 2011-05-25 2012-11-29 Renesas Mobile Corporation Resource allocation for d2d communication
CN103179575A (en) * 2011-12-23 2013-06-26 中兴通讯股份有限公司 Neighboring device communication method and system, network side device and user equipment
CN104885500B (en) * 2012-12-30 2019-04-16 Lg电子株式会社 The method that executive device communicates device in a wireless communication system
US10117087B2 (en) * 2013-08-01 2018-10-30 Fujitsu Limited Terminal clustering
US10524282B2 (en) * 2014-03-19 2019-12-31 Qualcomm Incorporated Scheduling assignment content and transmission in wireless communications
CN105338464B (en) * 2014-06-17 2020-10-20 索尼公司 Electronic device and wireless communication method on user equipment side in wireless communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101594632A (en) * 2009-06-29 2009-12-02 深圳华为通信技术有限公司 The methods, devices and systems that switch the sub-district
WO2013044864A1 (en) * 2011-09-29 2013-04-04 华为技术有限公司 Method and device for communication mode switchover

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
D2D Communication without network coverage;Nokia, NSN;《3GPP TSG-RAN WG1 Meeting #74，R1-133495》;20130823;参见全文 *
Resource Allocation of D2D communication;ZTE;《3GPP TSG-RAN WG1 Meeting #74bis，R1-134308》;20131011;参见全文 *

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